JP3828353B2 - Storage sheet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a storage seat that includes a seat cushion and a seat back provided at the rear portion of the seat cushion, and is in a retracted state in which the seat cushion sinks forward and downward from an upright state.
[0002]
[Prior art]
An example of a conventional storage mechanism of the storage sheet will be described with reference to FIGS. FIG. 5 is a view for explaining the configuration of the main part of a conventional storage sheet in a standing state, and FIG. 6 is a view when the storage sheet in FIG. 5 is in the storage position.
[0003]
In the figure, 2 is a seat back and 3 is a seat cushion.
A lower base 1 is provided on the floor side, and an upper base 5 is provided on the seat cushion frame side of the seat cushion 3.
[0004]
One end of the front link 7 is rotatably attached to the front side of the lower base 1 using a front lower pin 9, and the other end is attached to the front side of the upper base 5 so as to be rotatable using a front upper pin 11. Yes.
[0005]
One end side of the rear link 13 is rotatably attached to the rear side of the lower base 1 using a rear lower pin 15, and the other end side is rotatably attached to the rear side of the upper base 5 using a rear upper pin 17.
[0006]
Therefore, a four-bar rotation mechanism is formed by the lower base 1, the upper base 5, the front link 7, and the rear link 13, and the seat cushion 3 is supported so as to be movable up and down.
[0007]
A guide 21 is formed on the front link 7 along the longitudinal direction of the link.
On the other hand, one end of the long link 25 is rotatably attached to the rear lower pin 15.
[0008]
A pin 23 movably engaged with the guide 21 is provided on the other end side of the long link 25.
In the standing state (see FIG. 5), the position of the seat cushion 3 is held by a lock mechanism (not shown) that prohibits the movement of the pin 23.
[0009]
The operation of the above configuration will be described. When the locking mechanism (not shown) is released in the standing state shown in FIG. 5 and a downward force F is applied to the seat, the pin 23 descends along the guide 21 and the seat cushion 3 It sinks in front and lower.
[0010]
Further, by retracting the seat back 2 forward, the storage state shown in FIG. 6 is obtained.
[0011]
[Problems to be solved by the invention]
However, in the storage seat having the above-described configuration, when the seat cushion 3 is moved up and down, the pin 23 moves along the guide 21, that is, the connection between the pin 23 and the guide 21 is a "slip pair". Considering component accuracy and assembly accuracy, a relatively large amount of clearance is required between the pin 23 and the guide 21.
[0012]
Due to this clearance, there is a problem in that the seat cushion 3 is loose in the front-rear direction and the seating feeling is poor.
Further, when a child seat corresponding to ISOFIX is attached to such a storage sheet, the static strength requirement is also defined in ISOFIX.
[0013]
That is, when a static load application device (Staticforce application device: S-FAD) defined by ISOFIX is mounted on a seat and a static load in the specified forward direction is applied to the static load load device, the displacement is reduced. It is prescribed.
[0014]
However, in the case of the storage seat configured as shown in FIGS. 5 and 6, the back-and-forth movement occurs in the seat cushion 3, so that there is a problem that the displacement target cannot be achieved.
[0015]
The present invention has been made in view of the above problems, and an object thereof is to provide a storage seat having high rigidity and good seating feeling.
[0016]
[Means for Solving the Problems]
The invention according to claim 1, which solves the above problem, is a storage seat comprising a seat cushion and a seat back provided at a rear portion of the seat cushion, wherein the seat cushion is in a retracted state in which the seat cushion sinks forward and downward. The front link has a lower end that is rotatably attached to the floor, an upper end that is rotatably attached to the front side of the seat cushion, and a lower end that is rotatably attached to the floor side, and the upper end is rotated to the rear side of the seat cushion. A front link, a rear link, the seat cushion, and the floor side to form a four-bar rotation mechanism, and one end side of the four-bar link mechanism A long link rotatably attached to any one of the links, and the long link of the four-bar rotation mechanism. A support link in which one end side is rotatably attached to a link other than a link to which a link is attached, and the other end side is rotatably attached to the other end side of the long link; A first locking mechanism that prohibits relative displacement between the long link and the support link when in the raised position, and unlocking the first locking mechanism in conjunction with the forward tilting of the seat back; It is a storage sheet provided with the lock release mechanism to perform.
[0017]
One end side of the four-bar rotation mechanism other than the link to which the long link is attached is rotatably attached, and the other end side is rotatably attached to the other end side of the long link. By providing the link and the first lock mechanism that prohibits relative displacement between the long link and the support link when the seat cushion is in the raised position, the long link and the support link are all “ It is connected by “turn pair” which requires less clearance than “slip pair”.
[0018]
Therefore, the amount of back and forth play is reduced and the rigidity is increased.
Further, by providing a lock release mechanism that unlocks the first lock mechanism in conjunction with the forward-turning of the seat back, an operation for unlocking the first lock mechanism becomes unnecessary, and operability is good.
[0019]
According to a second aspect of the present invention, there is provided an urging means for urging the seat of the first aspect of the invention upward, and a second lock mechanism for prohibiting the raising of the sheet when the seat is in a retracted state. The storage sheet is characterized by this.
[0020]
By providing the urging means for urging the seat upward, the operation force for moving the seat from the retracted state to the standing state is reduced or unnecessary.
By providing the second lock mechanism that prohibits the seat from being raised when the seat is in the retracted state, it is possible to prevent the seat from moving unexpectedly from the retracted state to the standing state.
[0021]
Invention of Claim 3 is invention of Claim 1 or 2 In the storage state, The storage seat is provided with a canceling mechanism for canceling the operation of the unlocking mechanism operated in conjunction with the forward tilting of the seat back.
[0022]
When standing up with the lock release mechanism operating in the retracted state, the first lock mechanism that prohibits the relative displacement between the long link and the support link does not operate, and thus cannot be held in the upright state.
[0023]
In the present invention, When in the storage state, By providing a canceling mechanism that cancels the operation of the unlocking mechanism that operates in conjunction with the forward tilt of the seatback, the unlocking mechanism is canceled by the canceling mechanism when in the retracted state, so the first locking mechanism is locked When it becomes possible and stands up, the first lock mechanism that prohibits relative displacement between the long link and the support link operates, and can be held in the standing state.
[0024]
According to a fourth aspect of the present invention, the lower end portion is rotatably provided on the floor side in conjunction with the storage of the sheet according to any one of the first to third aspects, and is urged in a standing direction. This is a storage sheet provided with a buckle interlocking mechanism that also causes the buckle to tilt forward.
[0025]
In conjunction with the storage of the seat, a lower end portion is rotatably provided on the floor side, and a buckle interlocking mechanism is provided that also allows the buckle biased in the standing direction to be tilted forward. Can be prevented from protruding.
[0026]
The invention according to claim 5 is the invention according to claims 1 to 4 An anchor seat to which a child seat corresponding to ISOFIX can be attached is provided between the seat back and the seat cushion of any one of the inventions.
[0027]
By providing an anchor to which a child seat corresponding to ISOFIX can be attached between the seat back and the seat cushion, the child seat can be securely and easily fixed to the storage seat.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of a storage sheet according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along a cutting line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along a cutting line BB in FIG. is there.
[0029]
▲ 1 ▼ Sheet
The seat 300 according to the present embodiment includes a seat cushion 310 and a seat back 330.
[0030]
In the seat cushion 310, a first cushion frame 313 made of a pipe material and a second cushion frame 314 connected to the first cushion frame 313 are provided.
[0031]
The seat back 330 can be tilted forward and backward with respect to the seat cushion 310 by a reclining mechanism 350 fixed to the second cushion frame 314 and a frame (not shown) of the seat back 330.
[0032]
(2) Mechanism for moving the seat 300 between the retracted position and the raised position
A seat track 100 is disposed on the floor. The seat track 100 includes a lower rail 130 fixed on a floor and an upper rail 120 that is movably engaged with the lower rail 130.
[0033]
In this embodiment, the seat track 100 is provided on both sides, and a mechanism for raising and lowering the seat is provided on the seat track. However, since the structure is the same, the explanation is given using the mechanism on one side. To do.
[0034]
On the upper rail 120, first and second brackets 133, 135 are provided.
A lower end side of the front link 200 is rotatably attached to the first bracket 133 using a pin 201.
[0035]
Furthermore, brackets 315 are provided on both sides of the first cushion frame 313, and a shaft 317 is provided so as to bridge the brackets 315.
[0036]
The upper end side of the front link 200 is rotatably engaged with the shaft 317.
As shown in FIG. 2, in the present embodiment, the front links 200 provided on both sides are integrated via a bridging portion 200 ′.
[0037]
Further, the lower portion of the second bracket 135 has a U-shaped cross section as shown in FIG. A pin 401 is provided so as to penetrate the U-shaped cross section, and the lower end side of the rear link 400 is rotatably attached to the pin 401.
[0038]
The upper end side of the rear link 400 is rotatably attached to the second cushion frame 314 using a pin 405.
As shown in FIG. 3, rear links 400 provided on both sides are also integrated via a bridge portion 400 ′ in the same manner as the front link 200.
[0039]
Therefore, the front link 200, the rear link 400, the first cushion frame 313, the second cushion frame 314 (seat cushion 310), the upper rail 120, the first bracket 133, and the second bracket 135 (floor) Thus, a four-bar rotation mechanism is formed, and the sheet 300 can move between the raised position and the retracted position.
[0040]
Further, the seat 300 is attached in the raised position direction by a torsion spring 403 in which an intermediate portion is wound around the pin 401, one end is locked to the second bracket 135, and the other end is locked to the rear link 400. It is energized.
[0041]
A lower end portion of the long link 500 is rotatably attached to the pin 401.
One end of the support link 600 is rotatably attached to the middle portion of the front link 200 using a pin 601.
[0042]
The upper end portion of the long link 500 and the other end portion side of the support link 600 are rotatably connected by a shaft 550 provided so as to be bridged to both sides.
[0043]
Further, the first bracket 133 and the bracket 315 are formed with stopper portions 133a and 315a with which the front link 200 in the raised position abuts.
[0044]
(3) First lock mechanism 700
A base end portion of a hook 710 is rotatably attached to the shaft 317, and an engagement groove 711 that can be engaged with and disengaged from the shaft 550 is formed on the rotation end portion side of the hook 710. The hook 710 has an engaging groove formed by an urging means (not shown), for example, a torsion spring having an intermediate portion wound around the shaft 317, one end locked to the front link 200, and the other end locked to the hook 710. 711 is biased in a direction to engage the shaft 550.
[0045]
A first lock mechanism that prohibits relative displacement between the long link 500 and the support link 600 by engaging the engagement groove 711 of the hook 710 with the shaft 550 by the hook 710 and an urging means (not shown). Is formed.
[0046]
(4) Unlocking mechanism 720 of the first locking mechanism 700
In the reclining mechanism 350, a cancel pin 721 is provided at a position that tilts together with the seat back 330.
[0047]
When the seat back 330 is tilted forward, the cancel pin 721 moves. This movement is transmitted to a cable 725 whose one end is locked to the hook 710 via a cancel mechanism 750 described later, and the hook 710 is biased by pulling the cable 725 in conjunction with the forward tilt of the seat back 330. The first locking mechanism 700 is unlocked by rotating against the urging force and releasing the engagement groove 711 of the hook 710 from the shaft 550.
[0048]
(5) Cancellation mechanism 750
When the lock release mechanism 720 is operated while in the retracted state, the first lock mechanism 700 that prohibits relative displacement between the long link 500 and the support link 600 does not operate, and thus cannot be held in the upright state. .
[0049]
In the present embodiment, a cancel mechanism 750 that cancels the operation of the unlock mechanism 720 that operates in conjunction with the forward tilt of the seat back is provided.
The cancel mechanism 750 is rotatably provided on the second cushion frame 314 using a pin 751, and a first lever 753 to which the other end of the cable 725 is connected and a pin on the first lever 753. A second lever 757 that is rotatably provided using a 755, an intermediate portion is wound around a pin 755, one end is a first lever 753, and the other end is a second lever 757. The torsion spring 759 is locked, and a torsion spring (not shown) having one end locked to the second cushion frame 314 and the other end locked to the first lever.
[0050]
The first lever 753 is formed with a stopper portion 753 a with which the second lever 757 biased by the torsion spring 759 comes into contact.
The second cushion frame 314 is formed with a stopper 761 with which the first lever 753 urged by a torsion spring (not shown) comes into contact.
[0051]
Accordingly, the cancel pin 721 that moves in conjunction with the forward tilt of the seat back 330 pushes the second lever 757 to rotate clockwise in FIG. 1, and the second lever 757 pushes the stopper 753a of the first lever 753. When the first lever 753 rotates and the cable 725 is pulled, the lock of the first lock mechanism 700 is released.
[0052]
Further, when the seat back 330 is tilted forward, the cancel pin 721 moves over the second lever 757, and the first and second levers 753, 757 are returned to their original positions by the biasing force of a torsion spring (not shown). The hook 710 of the first lock mechanism 700 can be engaged with the shaft 550.
[0053]
(6) Second lock mechanism (storage position lock mechanism) 800
Since the seat 300 is biased in the upward position direction by the torsion spring 403, a storage position lock mechanism 800 that prohibits the seat 300 from being lifted at the storage position is provided.
[0054]
A hook 803 is rotatably attached to a bracket 801 provided on the first cushion frame 313 using a pin 805.
The hook 803 is formed with an engaging groove 803a that can be engaged with the pin 109, and is biased in a direction in which the engaging groove 803a is engaged with the pin 109 by a biasing means (not shown).
[0055]
Further, a release mechanism for rotating the hook 803 against this biasing means is provided.
▲ 7 ▼ Buckle interlocking mechanism
As shown in FIG. 3, a pin 851 having a large-diameter portion 851a formed in the middle portion and a threaded portion 851b formed on one end side is provided on the upper portion of the second bracket 135. A lower end portion of a buckle arm 855 having a seat belt buckle 853 provided at the tip is rotatably engaged with the screw portion 851b.
[0056]
The buckle arm 855 is attached to the second bracket 135 when the seated nut 857 is screwed into the male thread portion 851b.
Further, the buckle arm 855 is biased in a standing direction by a torsion spring 859 in which an intermediate portion is wound around the pin 851, one end is locked to the pin 851, and the other end is locked to the buckle arm 855. ing.
[0057]
The second bracket 135 is provided with a stopper 135a with which a protrusion 855a formed on the lower portion of the buckle arm 855 can come into contact, and restricts the standing position of the buckle arm 855.
[0058]
On the other hand, the second cushion frame 314 is provided with a buckle interlocking pin 861 that can come into contact with the buckle arm 855 when the seat cushion 310 is lowered.
[0059]
▲ 8 ▼ Child Seat Anchor
Between the second cushion frames 314 on both sides, a shaft 900 provided to bridge the both is provided.
[0060]
The shaft 900 is provided with an anchor 901 with which a child seat corresponding to ISOFIX is engaged.
The operation of the above configuration will be described.
[0061]
When the reclining mechanism 350 of the seat 300 in the raised position shown in FIG. 1 is operated and the seat back 330 is tilted forward, the first lock mechanism 700 is unlocked via the cancel mechanism 750, and the seat cushion of the seat 300 is released. 310 sinks forward and downward, and the storage state shown in FIG. 4 is obtained.
[0062]
At this time, the hook 803 of the storage position locking mechanism 800 is engaged with the pin 109 and the seat 300 is prohibited from ascending.
In order to change from the stored state to the standing state, the storage position lock mechanism 800 is unlocked and the seat 300 is raised. Then, the hook 710 of the first lock mechanism 700 that can be locked by the cancel mechanism 750 engages the shaft 550 and returns to the use position.
[0063]
In order to erect the seat back 330 that is tilted forward, the reclining mechanism 350 is operated to erect the seat back 330.
At this time, the cancel pin 721 pushes the second lever 757 of the cancel mechanism 750 and rotates it counterclockwise in FIG. 1, but the first lever 753 holds the position as it is. When the cancel pin 721 gets over the second lever 757, the second lever 752 returns to the original position where it abuts against the stopper portion 753a of the first lever 753 by the urging force of the torsion spring 759.
[0064]
According to the above configuration, the following effects can be obtained.
(1) One end side is rotatably attached to the front link 200 which is a link other than the link to which the long link 500 of the four-bar rotation mechanism is attached, and the other end side is the other end side of the long link 500 And a support link 600 that is rotatably mounted, a long link 500 and a first lock mechanism 700 that prohibits relative displacement between the support link 600 when the seat cushion 310 is in the raised position. The long link 500 and the support link 600 are all connected by a “turn pair” that requires less clearance than the “slip pair”.
[0065]
Therefore, the amount of back and forth play is reduced and the rigidity is increased.
Further, by providing the unlock mechanism 720 that unlocks the first lock mechanism 700 in conjunction with the forward movement of the seat back 330, an operation for unlocking the first lock mechanism 700 becomes unnecessary, and operability is improved. Is good.
[0066]
(2) By providing the torsion spring 403 that biases the seat 300 upward, the operating force for moving the seat 300 from the retracted state to the standing state is reduced or unnecessary. By providing the second lock mechanism (storage position lock mechanism) 800 that prohibits the seat 300 from being lifted when it is in the retracted state, it is possible to prevent the seat from moving unexpectedly from the retracted state to the standing state.
[0067]
(3) In the retracted state, when the lock release mechanism is operated and is raised, the first lock mechanism that prohibits the relative displacement between the long link and the support link does not operate, so that it cannot be held in the raised state.
[0068]
In this embodiment, by providing a cancel mechanism 750 that cancels the operation of the unlock mechanism 720 that operates in conjunction with the forward tilt of the seat back 330, the cancel mechanism 750 causes the lock release mechanism 720 to be Since the first lock mechanism 700 is locked, the first lock mechanism 700 that prohibits the relative displacement between the long link 500 and the support link 600 operates to operate in the upright state. Can hold.
[0069]
(4) By providing a buckle interlocking mechanism that also causes the buckle arm 835 biased in the standing direction to tilt forward in conjunction with the storage of the seat 300, the buckle 853 is prevented from protruding from the stored seat 300. it can.
[0070]
(5) By providing the anchor 901 on which the child seat corresponding to ISOFIX can be mounted between the seat back 330 and the seat cushion 310, the child seat can be securely and easily fixed to the storage seat.
[0071]
The present invention is not limited to the above embodiment. In the above embodiment, one end portion side of the long link 500 is provided rotatably on the second bracket 135, and one end portion side of the support link 600 is provided rotatably on the front link 200. However, the long link 500 includes the front link 200, the rear link 400, the first cushion frame 313, the second cushion frame 314 (seat cushion 310), the upper rail 120, the first bracket 133, and the second bracket. The support link may be rotatably attached to any link other than the link to which the long link is attached.
[0072]
【The invention's effect】
As described above, according to the first aspect of the present invention, one end side is rotatably attached to a link other than the link to which the long link of the four-bar rotation mechanism is attached, and the other end side is attached to the link. A first lock mechanism that prohibits relative displacement between the long link and the support link when the seat cushion is in the raised position, and a support link rotatably attached to the other end side of the long link. The long link and the support link are all connected with a “turn pair” that requires less clearance than a “slip pair”.
[0073]
Therefore, the amount of back and forth play is reduced and the rigidity is increased.
Further, by providing a lock release mechanism that unlocks the first lock mechanism in conjunction with the forward-turning of the seat back, an operation for unlocking the first lock mechanism becomes unnecessary, and operability is good.
[0074]
According to the second aspect of the present invention, by providing the urging means for urging the seat upward, the operating force for moving from the retracted state to the standing state is reduced or unnecessary.
By providing the second lock mechanism that prohibits the seat from being raised when the seat is in the retracted state, it is possible to prevent the seat from moving unexpectedly from the retracted state to the standing state.
[0075]
According to the third aspect of the present invention, the first lock mechanism that prohibits relative displacement between the long link and the support link does not operate when the lock release mechanism is erected while operating in the retracted state. Cannot be held in the state.
[0076]
In the present invention, since the cancel mechanism for canceling the operation of the unlock mechanism that operates in conjunction with the forward tilt of the seat back is provided, the unlock mechanism is canceled by the cancel mechanism in the retracted state. The lock mechanism is in a lockable state. When the lock mechanism is erected, the first lock mechanism that prohibits relative displacement between the long link and the support link operates to hold the erected state.
[0077]
According to a fourth aspect of the present invention, there is provided a buckle interlocking mechanism in which a lower end portion is rotatably provided on the floor side in conjunction with the storage of the seat, and a buckle biased in a standing direction is also tilted forward. This prevents the buckle from protruding from the stored seat.
[0078]
According to the fifth aspect of the present invention, the child seat can be securely and easily fixed to the storage seat by providing an anchor to which the child seat corresponding to ISOFIX can be attached between the seat back and the seat cushion. It becomes.
[Brief description of the drawings]
FIG. 1 is a side view of a storage sheet according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along a cutting line AA in FIG.
3 is a cross-sectional view taken along a cutting line BB in FIG.
4 is a diagram showing a storage state in FIG. 1. FIG.
FIG. 5 is a diagram illustrating a main configuration of a conventional storage sheet in a standing state.
6 is a view when the storage sheet of FIG. 5 is in the storage position. FIG.
[Explanation of symbols]
300 seats
310 seat cushion
330 seat back
500 long links
600 Support link
700 First locking mechanism

Claims (5)

A storage seat comprising a seat cushion and a seat back provided at a rear portion of the seat cushion, wherein the seat cushion is in a retracted state in which the seat cushion sinks forward and downward from a standing state.
A front link having a lower end rotatably attached to the floor and an upper end rotatably attached to the front side of the seat cushion;
A rear link whose lower end is rotatably attached to the floor, and whose upper end is rotatably attached to the rear side of the seat cushion;
The front link, the rear link, the seat cushion, and a four-bar rotation mechanism on the floor side,
Furthermore, one end side is a long link rotatably attached to any link of the four-bar linkage mechanism,
One end side is rotatably attached to a link other than the link to which the long link of the four-bar rotation mechanism is attached, and the other end side is rotatably attached to the other end side of the long link. A support link,
A first lock mechanism that prohibits relative displacement between the long link and the support link when the seat cushion is in the raised position;
With
A storage seat comprising a lock release mechanism for releasing the lock of the first lock mechanism in conjunction with a forward tilt of the seat back. Biasing means for biasing the sheet upward;
A second lock mechanism that prohibits the seat from being lifted when it is in a retracted state;
The storage sheet according to claim 1, wherein the storage sheet is provided. 3. The storage seat according to claim 1, further comprising a cancel mechanism that cancels the operation of the unlocking mechanism that operates in conjunction with the forward tilting of the seat back when in the storage state . 2. A buckle interlocking mechanism in which a lower end portion is rotatably provided on the floor side in conjunction with the storing of the seat, and a buckle biased in a standing direction is also tilted forward. 4. The storage sheet according to any one of 3 above. The storage seat according to any one of claims 1 to 4 , wherein an anchor to which a child seat corresponding to ISOFIX can be attached is provided between the seat back and the seat cushion.

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